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<h2>7.7 &nbsp;&#26631;&#28857;&#31526;&#21495;</h2>


<b>&#35821;&#27861;</b><br>


<p><i>&#26631;&#28857;&#31526;&#21495;</i> <b>:: one of</b><br>


<tt>{</tt><tt>&nbsp;
</tt><tt>}</tt><tt>&nbsp;
</tt><tt>(</tt><tt> &nbsp;</tt><tt>)</tt><tt>&nbsp;
</tt><tt>[</tt><tt>&nbsp;
</tt><tt>]</tt><tt>&nbsp;
</tt><tt>.</tt><tt>&nbsp;
</tt><tt>;</tt><tt>&nbsp;
</tt><tt>,</tt><tt>&nbsp;
</tt><tt>&lt;</tt><tt>&nbsp;
</tt><tt>&gt;</tt><tt>&nbsp;
</tt><tt>&lt;=</tt><tt>&nbsp;
</tt><tt>&gt;=</tt><tt>&nbsp;
</tt><tt>==</tt><tt>&nbsp;
</tt><tt>!=</tt><tt>&nbsp;
</tt><tt>===</tt><tt>&nbsp;
</tt><tt>!==
</tt><tt>&nbsp;
</tt><tt>+ &nbsp;- &nbsp;* &nbsp;% &nbsp;++ &nbsp;--&nbsp;
&lt;&lt;&nbsp;
&gt;&gt;&nbsp;
&gt;&gt;&gt;&nbsp;
&amp;&nbsp;
|&nbsp;
^&nbsp;
!&nbsp;
~&nbsp;
&amp;&amp;&nbsp;
||&nbsp;
?
&nbsp; : &nbsp;=&nbsp;
+=&nbsp;
-=
&nbsp;*=&nbsp;
%=
&nbsp;&lt;&lt;=&nbsp;
&gt;&gt;=&nbsp;
&gt;&gt;&gt;=&nbsp;
&amp;=&nbsp;
|=&nbsp;
^=</tt>
</p>


<p><i>&#38500;&#21495;&#26631;&#28857;&#31526;&#21495;</i> <b>:: one of</b><br>

<tt> /</tt><tt>&nbsp;
</tt><tt>/=</tt></p>


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